Survey marker



FIG. 1 is perspective view of a survey marker in accordance with my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a side elevational view thereof.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a survey marker, as shown and described. 